SQL Server Date Format Yyyy-mm-ddthh: mm: ss
select REPLACE(convert(varchar, getdate() , 20), ' ', 'T')
dr4ft
select REPLACE(convert(varchar, getdate() , 20), ' ', 'T') convert(varchar, [column_date], 20) --(date or datetime) to yyyy-MM-dd HH:mm:ss
convert(varchar, [column_date], 23) --(date or datetime) to yyyy-MM-dd
--ref https://www.mssqltips.com/sqlservertip/1145/date-and-time-conversions-using-sql-server/